Doepfer A-119 External Input/Envelope Follower

The Doepfer A-119 External Input/Envelope Follower integrates an external instrument or audio source's signal to your eurorack modular system. The audio signal is turned into a modulation signal by means of full wave rectification, and also a gate threshold can be set up on the front panel. The gate out can make the external input source open VCA's, restart seqeuencers or LFO's, etc. It is the bridge between your modular and the outside world.

The Doepfer A-119 External Input/Envelope Follower integrates an external instrument or audio source's signal to your eurorack modular system. The audio signal is turned into a modulation signal by means of full wave rectification, and also a gate threshold can be set up on the front panel. The gate out can make the external input source open VCA's, restart seqeuencers or LFO's, etc. It is the bridge between your modular and the outside world.

The Doepfer A-119 External Input/Envelope Follower (External Input / Envelope Follower) is designed to allow external audio signals to be integrated into the System A-100. It comprises a pre-amp, envelope follower, and comparator.

The pre-amp has two inputs: an unbalanced input for line level signals, with a gain factor of from 0 to 20, and a balanced input with a gain factor of from 0 to 500, for insertion of low level signals, for instance from a microphone or electric guitar.The Envelope Follower reads the signal level of the input, and puts out a proportional voltage as an envelope at its own output.

The comparator generates a gate signal whenever the input goes above an adjustable trigger threshold.Three LEDs help you keep track of overload, the envelope, and the gate signal.